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# [Insert Puzzler Here] - PowerPoint PPT Presentation

[Insert Puzzler Here]. ANNOUNCEMENTS. 1 of 3. a. A farm tractor is accelerating over level ground. The force of friction acting upon the tractor due to the ground is best represented by which vector?. 3. 2. 1. F Fr. F Fr. F Fr. 3. 2 of 3.

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Presentation Transcript

a

A farm tractor is accelerating over level ground. The force of friction acting upon the tractor due to the ground is best represented by which vector?

3

2

1

FFr

FFr

FFr

3

• A farm tractor is pulling a wagon. The tractor is three times heavier than the wagon. The tractor starts from rest and accelerates for a short while. The magnitude of the force with which the wagon pulls on the tractor is

• Zero.

• One-third of that with which the tractor pulls on the wagon.

• Equal to that with which the tractor pulls on the wagon.

• Three times that with which the tractor pulls on the wagon.

a

4

• A farm tractor is pulling a wagon. The tractor is moving with uniform speed over the level earth. The net force acting upon the wagon is

• To the right.

• Zero.

• To the left.

v

5

a

A farm tractor is accelerating over level ground. The force of friction acting upon the tractor due to the ground is best represented by which vector?

3

2

1

FFr

FFr

FFr

9

• A farm tractor is pulling a wagon. The tractor is three times heavier than the wagon. The tractor starts from rest and accelerates for a short while. The magnitude of the force with which the wagon pulls on the tractor is

• Zero.

• One-third of that with which the tractor pulls on the wagon.

• Equal to that with which the tractor pulls on the wagon.

• Three times that with which the tractor pulls on the wagon.

a

10

• A farm tractor is pulling a wagon. The tractor is moving with uniform speed over the level earth. The net force acting upon the wagon is

• To the right.

• Zero.

• To the left.

v

11

1

4

1

4

1

4

1

4

2

5

2

5

2

5

2

5

3

6

3

6

3

6

3

6

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